J4 ›› 2009, Vol. 36 ›› Issue (4): 746-750.

• 研究论文 • 上一篇    下一篇

S弯进气道隐身设计中弯度参数研究

姬金祖;武哲;刘战合   

  1. (北京航空航天大学 航空科学与工程学院,北京  100083)
  • 收稿日期:2008-04-21 出版日期:2009-08-20 发布日期:2009-09-28
  • 通讯作者: 姬金祖
  • 基金资助:

    973项目资助(61320)

Research on the curvature parameter in the S-shaped inlet's stealth design

JI Jin-zu;WU Zhe;LIU Zhan-he   

  1. (School of Aeronautic Sci. and Eng., Beijing Univ. of Aeronautics and Astronautics, Beijing  100083, China)
  • Received:2008-04-21 Online:2009-08-20 Published:2009-09-28
  • Contact: JI Jin-zu

摘要:

进气道是飞行器头向重点姿态角域内的强散射源.雷达散射截面减缩方法之一是将进气道设计成S弯形,以增加电磁波在进气道内反射次数,减少后向回波.在微波暗室内对系列S弯进气道进行了测试,研究上下弯折和水平弯折的进气道相对弯度对S弯形进气道散射的影响.实验结果表明,垂直极化下头向雷达散射截面均值随弯度呈“W”形变化,有两个极小值;水平极化下两种弯折方式头向雷达散射截面均值变化趋势差异较大,上下弯折时呈“W”形变化,水平弯折时单调降低.总体而言,适当的相对弯度可以较好地降低进气道的后向雷达散射截面.

关键词: 进气道, 雷达散射截面, 电磁散射, 隐身

Abstract:

The inlet is a strong scattering source in the aircraft head important attitude angle. One way to reduce RCS (Radar Cross Section) is to make the inlet S-shaped to increase the electromagnetic wave reflection time to reduce backward wave energy. A series of S-shaped inlets bended vertically and horizontally are tested in the microwave anechoic chamber to study relative curvature's influence. Experimental result shows that when the incident is vertically polarized, the head direction RCS average's variation along the relative curvature is of “W” shape and has 2 minimum values; when horizontally polarized, the head direction RCS average's variation is different in two bend fashions. The variation is of “W” shape when vertically bended and monotonously descends when horizontally bended. Generally speaking, a proper relative curvature can reduce the backward's RCS of the inlet.

Key words: inlet, radar cross section, electromagnetic scattering, stealth

中图分类号: 

  • V218